Jobless rate falls to 7.8 pct.

The U.S. unemployment rate fell to 7.8 percent last month, dropping below 8 percent for the first time in nearly four years.

The rate declined from 8.1 percent because the number of people who said they were employed soared by 873,000 — an encouraging sign for an economy that’s been struggling to create enough jobs.

The number of unemployed Americans is now 12.1 million, the fewest since January 2009.

The Labor Department said today that employers added 114,000 jobs in September. It also said the economy created 86,000 more jobs in July and August than the department had initially estimated.

Wages rose in September. And more people started looking for work.

The revisions show employers added 146,000 jobs per month from July through September, up from 67,000 in the previous three months.

The 7.8 percent unemployment rate for September matches the rate in January 2009, when President Barack Obama took office. In the months after Obama’s inauguration, the rate rose sharply and had topped 8 percent for 43 straight months.

The number of employed Americans comes from a government survey of 60,000 households that determines the unemployment rate. The government asks a series of questions, by phone or in person. For example:

Do you own a business? Did you work for pay? If not, did you provide unpaid work for a family business or farm? (Those who did are considered employed.)

Afterward, the survey participants are asked whether they had a job and, if so, whether it was full or part time.

The government’s definition of unemployed is someone who’s out of work and has actively looked for a job in the past four weeks.

The government also does a second survey of roughly 140,000 businesses to determine the number of jobs businesses created or lost.

The September job gains were led by the health care industry, which added 44,000 jobs — the most since February. Transportation and warehousing also showed large gains.

The revisions also showed that federal, state and local governments added 63,000 jobs in July and August, compared with earlier estimates that showed losses.

Still, many of the jobs the economy added last month were part time. The number of people with part-time jobs who wanted full-time work rose 7.5 percent to 8.6 million.